August 1, 2025

Modelling the effects of immigration on the re- introduction of onchocerciasis

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Modeling shows immigration increases onchocerciasis transmission risk in communities, implying need for extended surveillance strategies.

Infection-free communities are vulnerable to onchocerciasis re-introduction due to immigration from endemic areas.
The risk of ongoing transmission is influenced by community size, annual biting rate, and number of incoming immigrants.
Small communities with low annual biting rates face heightened risk of infection persistence after immigration.
Current post-treatment surveillance durations may be insufficient, requiring additional monitoring for sustained elimination.

Stapley et al. (2025) studied this question.

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